Antifouling paint and varnish.



. e. 9. animal and vegetable however, either not'sufiiciently efi'ective or i the oxymercuric butyric acid anhydrid:

U ITED STATES PATENT OFFICE.

T0 FARBENFABRIKEN VORM. FRIEDR. BAYER & (30., OF A CORPORATION OF GERMANY.

ANTLFQULING PAINT AND VARNISH.

Specification of Letters Patent. Patented Aug, 16, 1910, Application filed May 20, 1903. Serial No. 497,304.

967,841 No Drawing.

etc, maybe used'for the production of the preservative paints, etc. The latter product is known as the hydrargyrum salicylicum of the German P/2armcic0p02ia,'wl1ile the former preparations are made in accordance with the directions given in our German Patent No. 208,634 and in accordance with To all whom it may canoe/"n: I 'Be it known that we, WALTER SGHOELLER and \VALTHER SCHRAUTH, ophy, chemists, citizens of pire, residing at Berlin, Germany, have invented 'new and useful Improvements in Antifouling Paints and varnishes, of which doctors of philosthe German Emthe following is a-specification. the publication in the Bem'chtc de'r' Our invention relates to the manuf ture Deutsclzen (llzemc'scllen Gesellsclmfavol. 35,

of'preparations suitable as coatings, paints page 2870.

or varnishes which are remarkablefor their A useful preparation can be obtained for good preservative properties. They prevent growth from forming on the object painted, such as on ships bottoms, etc. It has been hithertoattempted to'attain this end by adding certain poisonous salts or strong bases to the paint material. The substances used are,

instance by mixing 1 part of one of the mentioned substances with 25 parts of av suitable coating material, such as varnishes, paints, et c., but the quantities and' the solvents may be varied without altering thereby the nature of the invention.

1. As new articles of manufacture a coat- .ing material comprising an anhydrid of an oxymercuric substituted organic acid in conjunction with other suitable substances,-s11bstantially as described.

2. As a new article of manufacture a coating material comprising the oxymercuric salicylic acid anhydrid in conjunction with other suitable substances,substantially as described.

In testimony whereof we have hereunto quite useless. We have now found that by using for this purpose anhydridjs of oxyinercuric substituted organic acids the desired effect is produced in every respect in the best possible manner. The oxyinercuric acetic acid anhydrid:

CH2.( 3O1 H /5? set our hands in the presence of two sub- Q i scribing witnesses.

WALTER SCHOELLER. WALTHER SCHRAUTH' the oxym ercuric salicylic acid anhydrid:

on Vitn'esses H oaHro0, HENRY HAsPER,

WOLDEMAB HAUPT.

ELBERFELD, GERMANY, 

